CVE-2025-61865VulnerabilityPublished 23 Oct 2025Updated 10 Dec 2025

CVE-2025-61865: I-O DATA DEVICE NarSuS App · Unquoted search path or element

Affects I-O DATA DEVICE NarSuS AppSource CVE Database V5

Not known to be exploited · CVSS 6.7 Medium : upgrade to 2.33 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.0 base score

6.7Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.33

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector: Local
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade I-O DATA DEVICE NarSuS App to 2.33.

Affected software

Product	Affected	Fixed in
I-O DATA DEVICE, INC. NarSuS App	Affected <2.33	Fixed in 2.33

AI-suggested

1. Immediately upgrade the NarSuS App to version 2.33 or later where the unquoted service path issue is resolved. 2. Audit and restrict write permissions on the root directory of the system drive (e.g., C:\) to prevent unauthorized file placement. 3. Regularly review Windows service configurations to ensure all service paths are properly quoted and do not contain spaces that could be exploited. 4. Implement application whitelisting and endpoint protection solutions to detect and block unauthorized executable files in critical system locations. 5. Monitor system logs and service start events for anomalies that may indicate exploitation attempts. 6. Educate local users about the risks of placing files in system directories and enforce least privilege principles. 7. For environments where patching is delayed, consider temporary mitigations such as disabling vulnerable services if feasible or isolating affected devices from critical networks. 8. Conduct penetration testing and vulnerability assessments focused on local privilege escalation vectors to identify similar risks.

Description

Multiple NAS management applications provided by I-O DATA DEVICE, INC.register Windows services with unquoted file paths. A user with the write permission on the root directory of the system drive may execute arbitrary code with SYSTEM privilege.

Impact

For European organizations, this vulnerability presents a notable risk especially in environments where endpoint security policies are lax, allowing users write access to system drive roots. Successful exploitation leads to full SYSTEM privilege escalation, enabling attackers to install persistent malware, exfiltrate sensitive data, disrupt NAS services, or pivot within the network. This can severely impact data confidentiality, system integrity, and availability of critical storage infrastructure. Sectors such as finance, healthcare, manufacturing, and government agencies that rely on NAS devices for data storage and backup are particularly vulnerable. The medium CVSS score indicates a moderate but actionable threat, with potential for significant operational disruption if exploited. The absence of known exploits reduces immediate risk but should not lead to complacency. European organizations with distributed NAS deployments or remote/local user access should be vigilant. The threat also underscores the importance of strict permission management and service path hygiene in Windows environments.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Dec 2025, 07:26 UTC

Technical details

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